Results 121 to 130 of about 5,601 (174)
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Developments in the Chemistry of 2-Pyridone
Synthetic Communications, 2014Abstract The focus of our review is on the methods of synthesis and chemical reactivity of 2-pyridone and some derivatives as 2-chloro-3-nicotinonitrile in addition to the biological activity of the 2-pyridone moiety.
Wafaa Salama Hamama +3 more
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Orientation in the nitration of 2-pyridones
Chemistry of Heterocyclic Compounds, 1978The ratio of 3- and 5-nitro isomers formed in the nitration of 2-pyridones with nitric acid is determined by the reaction temperature but is independent of the concentration of the nitrating agent. The presence of a phenyl group in the 6 position of the α-pyridone ring hinders incorporation of a nitro group in the 5 position.
N. P. Shusherina +2 more
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Multicomponent Synthesis of Highly Substituted 2‐Pyridones.
ChemInform, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Carlos Marcos +5 more
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Tautomerism and Microsolvation in 2-Hydroxypyridine/2-Pyridone
The Journal of Physical Chemistry A, 2010The Fourier transform microwave spectra of the hydrated forms of the tautomeric pair 2-pyridinone/2-hydroxypyridine (2PO/2HP) have been investigated in a supersonic expansion. Three hydrated species, 2PO-H₂O, 2HP-H₂O, and 2PO-(H₂O)₂, have been observed in the rotational spectrum.
S. Mata +6 more
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Photochemical dehydrogenation of 3,4-dihydro-2-pyridones
Photochemical & Photobiological Sciences, 2009Photochemical dehydrogenation of various substituted 3,4-dihydro-2-pyridones was achieved in a very efficient way by employing 10-15 mol% of photo-induced electron transfer sensitizers like 9-cyanoanthracene, 9-cyanophenanthrene and 1-cyanonaphthalene in presence of molecular oxygen, for the first time.
Partha Sarathi, Sadhu +3 more
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Enantioselective Photochemical Reactions of 2-Pyridones in Solution
Organic Letters, 2001[reaction: see text] Two key photochemical reactions of prochiral 2-pyridones were studied in the presence of a chiral host. The [4 + 4]-photocycloaddition with cyclopentadiene (CpH) proceeded smoothly and with high enantioselectivity (84-87% ee). The absolute configuration of the endo-diastereoisomer was established by X-ray crystallography.
T, Bach, H, Bergmann, K, Harms
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New Synthetic Methods for 2‐Pyridone Rings
ChemInform, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
Mercedes Torres +2 more
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Oxidation of chiral non-racemic pyridinium salts to enantiopure 2-pyridone and 3-alkyl-2-pyridones
Tetrahedron: Asymmetry, 1998Abstract Oxidation of chiral non-racemic pyridinium salt 1a and 3-alkyl pyridinium salts 1b and 1c with potassium ferricyanide in an alkaline medium provides a short and practical access to enantiomerically pure 2-pyridone ( 2a ) and 3-alkyl-2-pyridones ( 2b and 2c ) in high yields and very good regioselectivity from derivatives 1 ( b – c ).
Dino Gnecco +5 more
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Copper-Catalyzed Regioselective Imidation of 2-Pyridones
Organic LettersWe demonstrate a ligand- and glovebox-free regioselective direct C(3)-H imidation of 2-pyridones and also benzylic-type imidation of 2-pyridones bearing a methyl substituent employing Cu(OAc)2·H2O as the catalyst and N-fluorobenzenesulfonimide (NFSI) as an imidating reagent.
Tamilarasu Murugesan +4 more
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